Fire resistant non-halogen riser cable
AssigneeLucent Technologies Inc.
InventorsLarry Lynn Bleich, Tommy Glenn Hardin
Life of this patent
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Abstract
A communications cable that may be used in buildings in concealed areas such as riser shafts is constructed of non-halogen materials. The core includes insulated conductors that are enclosed with a plastic, polyolefin insulating material. These insulated conductors are twisted into pairs to form a multi-pair core. The core is surrounded and protected with a non-halogen, plastic jacket material. The cable has exceptional voice and data transmission properties due to the polyolefin insulation and is highly flame retardant. Compared with halogenated materials, the cable generates relatively little smoke, is less corrosive, and generates less toxic gases when burned.
Claims9
A communication cable comprising:
- a core having at least one pair of signal transmitting members of a communication transmission medium, each of said members having disposed thereabout a single, relatively uniform insulation layer of a non-fire retardant polyolefin material;
- and
- an outer jacket surrounding said core, said outer jacket comprising a fire retardant non-halogenated polyolefin material that comprises a base resin of an acetic acid ethenyl ester polymer with ethene having flame retardant and smoke suppressant materials therein.
A communication cable for use within a building comprising:
- a core comprising a plurality of insulated conductors arranged in twisted groups of twisted pairs of conductors to form a honeycomb structure;
- each of said conductors having a single, relatively uniform insulation layer of a non-fire retardant polyolefin material;
- and an outer jacket surrounding and enclosing said honeycomb structured core, said outer jacket comprising a base resin of an acetic acid ethenyl ester, polymer with ethene having flame retardant and smoke suppressant materials therein and having low corrosivity and toxicity.
Dependencies are inferred from the claim text.